D2D Terminal Device Partial Resource Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In device-to-device communication, the power consumption of terminal devices is excessively high due to the need to sense resources in a fixed-size segment of a resource pool, leading to increased energy expenditure during data transmission.
Innovation Solution
The terminal device senses and detects transmission resources within a reduced time-frequency resource set, rather than the entire resource set, to minimize power consumption and efficiently allocate resources for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource sensing is performed in the entire resource set, then resource allocation reliability is improved, but power consumption of the terminal device increases significantly
Solution Approach 1:
The resource pool is divided into multiple resource sets, and the terminal device only needs to sense a subset of these resource sets rather than the entire resource pool. This segmentation approach maintains sufficient resource allocation reliability while significantly reducing the sensing overhead and power consumption.
Solution Approach 2:
The terminal device performs sensing on only a partial portion of the resource sets (specifically, a configured subset rather than all resource sets). This partial action is sufficient to achieve reliable resource allocation without the excessive power consumption required for complete resource pool sensing.
2Measurement precision
If the terminal device senses all resources in the resource pool, then resource selection accuracy is improved, but communication efficiency deteriorates due to high power consumption
Solution Approach 1:
The resource pool is segmented into multiple resource sets with different priorities or importance levels. The terminal device focuses sensing efforts on the most relevant resource sets, achieving adequate resource selection accuracy while improving communication efficiency by avoiding unnecessary sensing of less important resources.
Solution Approach 2:
The network configures parameters such as the number of resource sets to sense, the size of each resource set, and the time-frequency distribution of these sets. By adjusting these parameters, the system optimizes the balance between resource selection accuracy and communication efficiency for different deployment scenarios.
Data Source
Figure 1~3
Figure 4~5(b)
Figure 5(c)~6
AI summary
Embodiments of the present invention provide a device-to-device communication method and a terminal device. The method includes: determining, by a terminal device, a first resource, where the first resource is some time-frequency resources in a first resource set, the first resource set is all time-frequency resources that can be used to detect a first transmission resource, and the first transmission resource is a spectrum resource used to transmit first data; performing, by the terminal device, detection for the first transmission resource in the first resource; and sending, by the terminal device, the first data on the first transmission resource. Detection for a transmission resource used to transmit data is performed on some time-frequency resources in an original resource set used for detection of a transmission resource in the prior art. Therefore, power consumption of the terminal device is reduced in a device-to-device communication process.